Question # 1

If E = { } , then P(E)

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∅

{ }

{(2),(4),(6)....}

(∅)

Which symbolic notation represent unary operation ?

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-

∨

∧

⇔

A conjunction of two statement p and q is true only if

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p is true

q is true

Both p and q are true

both p and q are false

There are n seats round a table numbered 1, 2, 3 .... n. The number of ways in which m person can take seats is

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ⁿP_m

ⁿC_mx (m - 1) !

^n-1P_m

None of these

Three points whose position vector a,b,c are collinear

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axb +b x c+ c x a = 0

a,b +b,c +c,a =0

a,|a xc| =0

a+b+c =0

If a,b,c are unit vectors then |a + b|2 +|a - b|2

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4

8ab

9cos

4(a,b)

The condition for polynomial equation ax2 + bx + c = 0 to be quadratic is

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a > 0

a < 0

a≠ 0

a≠ 0,b ≠ 0

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The probability that a slip of numbers divisible by 4 is picked from the slips of number 1,2,3,4,......10 is

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1/5

2/5

1/10

3/10

The multiplicative inverse of -1 in the set {1-, 1} is

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1

-1

+-1

0

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